Which example best demonstrates the concept of metabolism? a. the oils in a nut yield energy for the squirrel. b. in the fall, a bear builds a den. c. a person is shivering in the cold weather. d. a mold grows in a damp area.

Many organs are involved in the processes of keeping the blood and the body clean. when poisonous or harmful substances are in the blood, they are absorbed by the and released in a less harmful form. when wastes are present in the blood, they are filtered out and removed from the body by the

List five ways we are indebted to phytoplankton

Which of the following is an eon in the time scale? phanerozoic proterozoic archean all of the above